code: def example_data():
      # The following data is from the Denver Aerosol Sources and Health study.
      # See doi:10.1016/j.atmosenv.2008.12.017
      #
      # The data are pollution source profile estimates for five modeled
      # pollution sources (e.g., cars, wood-burning, etc) that emit 7-9 chemical
      # species. The radar charts are experimented with here to see if we can
      # nicely visualize how the modeled source profiles change across four
      # scenarios:
      #  1) No gas-phase species present, just seven particulate counts on
      #     Sulfate
      #     Nitrate
      #     Elemental Carbon (EC)
      #     Organic Carbon fraction 1 (OC)
      #     Organic Carbon fraction 2 (OC2)
      #     Organic Carbon fraction 3 (OC3)
      #     Pyrolyzed Organic Carbon (OP)
      #  2)Inclusion of gas-phase specie carbon monoxide (CO)
      #  3)Inclusion of gas-phase specie ozone (O3).
      #  4)Inclusion of both gas-phase species is present...
      data = [
          [
              "Sulfate",
              "Nitrate",
              "EC",
              "OC1",
              "OC2",
              "OC3",
              "OP",
              "CO",
              "O3",
          ],
          (
              "Basecase",
              [
                  [
                      0.88,
                      0.01,
                      0.03,
                      0.03,
                      0.00,
                      0.06,
                      0.01,
                      0.00,
                      0.00,
                  ],
                  [
                      0.07,
                      0.95,
                      0.04,
                      0.05,
                      0.00,
                      0.02,
                      0.01,
                      0.00,
                      0.00,
                  ],
                  [
                      0.01,
                      0.02,
                      0.85,
                      0.19,
                      0.05,
                      0.10,
                      0.00,
                      0.00,
                      0.00,
                  ],
                  [
                      0.02,
                      0.01,
                      0.07,
                      0.01,
                      0.21,
                      0.12,
                      0.98,
                      0.00,
                      0.00,
                  ],
                  [
                      0.01,
                      0.01,
                      0.02,
                      0.71,
                      0.74,
                      0.70,
                      0.00,
                      0.00,
                      0.00,
                  ],
              ],
          ),
          (
              "With CO",
              [
                  [
                      0.88,
                      0.02,
                      0.02,
                      0.02,
                      0.00,
                      0.05,
                      0.00,
                      0.05,
                      0.00,
                  ],
                  [
                      0.08,
                      0.94,
                      0.04,
                      0.02,
                      0.00,
                      0.01,
                      0.12,
                      0.04,
                      0.00,
                  ],
                  [
                      0.01,
                      0.01,
                      0.79,
                      0.10,
                      0.00,
                      0.05,
                      0.00,
                      0.31,
                      0.00,
                  ],
                  [
                      0.00,
                      0.02,
                      0.03,
                      0.38,
                      0.31,
                      0.31,
                      0.00,
                      0.59,
                      0.00,
                  ],
                  [
                      0.02,
                      0.02,
                      0.11,
                      0.47,
                      0.69,
                      0.58,
                      0.88,
                      0.00,
                      0.00,
                  ],
              ],
          ),
          (
              "With O3",
              [
                  [
                      0.89,
                      0.01,
                      0.07,
                      0.00,
                      0.00,
                      0.05,
                      0.00,
                      0.00,
                      0.03,
                  ],
                  [
                      0.07,
                      0.95,
                      0.05,
                      0.04,
                      0.00,
                      0.02,
                      0.12,
                      0.00,
                      0.00,
                  ],
                  [
                      0.01,
                      0.02,
                      0.86,
                      0.27,
                      0.16,
                      0.19,
                      0.00,
                      0.00,
                      0.00,
                  ],
                  [
                      0.01,
                      0.03,
                      0.00,
                      0.32,
                      0.29,
                      0.27,
                      0.00,
                      0.00,
                      0.95,
                  ],
                  [
                      0.02,
                      0.00,
                      0.03,
                      0.37,
                      0.56,
                      0.47,
                      0.87,
                      0.00,
                      0.00,
                  ],
              ],
          ),
          (
              "CO & O3",
              [
                  [
                      0.87,
                      0.01,
                      0.08,
                      0.00,
                      0.00,
                      0.04,
                      0.00,
                      0.00,
                      0.01,
                  ],
                  [
                      0.09,
                      0.95,
                      0.02,
                      0.03,
                      0.00,
                      0.01,
                      0.13,
                      0.06,
                      0.00,
                  ],
                  [
                      0.01,
                      0.02,
                      0.71,
                      0.24,
                      0.13,
                      0.16,
                      0.00,
                      0.50,
                      0.00,
                  ],
                  [
                      0.01,
                      0.03,
                      0.00,
                      0.28,
                      0.24,
                      0.23,
                      0.00,
                      0.44,
                      0.88,
                  ],
                  [
                      0.02,
                      0.00,
                      0.18,
                      0.45,
                      0.64,
                      0.55,
                      0.86,
                      0.00,
                      0.16,
                  ],
              ],
          ),
      ]
      return data
  
file_path: matplotlib/galleries/examples/specialty_plots/radar_chart.py
imports: import matplotlib.pyplot
  import numpy
  from matplotlib.patches import Circle, RegularPolygon
  from matplotlib.path import Path
  from matplotlib.projections import register_projection
  from matplotlib.projections.polar import PolarAxes
  from matplotlib.spines import Spine
  from matplotlib.transforms import Affine2D
label_desc: Use image node_id 2 for calling a global function with example usage: example_data() and returns: data